Circuit making and breaking device.



W. A. $TILES 0130mm? MAKING A 1\.. BREAKING DEVICE. APPLICATION PiLED OCT.11, 1909.

Lfziizaasets':

i umane UNITED STATES IZQTENT ,orr1on WINTHROP A. .STILES, or PHILADELPHIA, rENNsYLvAivIA.

CIRCUIT MAKI-NG ANnBREAKInG-nnvicnff gines, and the object is to provide a device of this class which shall be capable of in-, stantly making and breaking the circuit so that the circuit shall be closed during an'ex ceedingly short period oftime which is irrespective of the'spced of the engine'and thus effecting a great saving in current consumptlon \vhlch 1s a great fact-or where batteries are used to furnish the current.

The ob ect is further to provide a device of this class which shall have the smallest possible number of parts and which shall be durable and reliable in its action.

\Vhile the device of my invention is capable of general use, it is particularly intended i -pointed out in the claims.

and adapted to be used as a means for makmg and breaking the primary circuit of-induction 00118 of ignition apparatus for 1n-.

ternal combustion engines a: 1 when used in such connection a rotaiiable element of the device is connected t'o'and driven by the engine at a rate of speed indirect proportion to the engine speed andimparts a forward movement to a second element which when released by the first at a certain polnt returns to its initial position at a predetermined and constant rate of speed indcpendently of the rotatable element. It is during this return movement of the second element that it acts upon two contact points carried thereby to close the circuit during the shortest possible interval of time. In theattainmentoi" this object I have produ ced a clevice which is exceedingly simple and inexpensive yet durable in construction and which is unlikely to get out of order.

The invention consists in the novel features of construction and in the combination and arrangement of parts set forth in the following specification and Referring to the drawings: Figure 1 is Specification of Letters Patent;

particularly;

rammed Mar. 19,1912;

Application filed October 11, 1909. Serial No. 522,145. Y

plan section of a circuit making and breaking device embodying'my inventiofshowing. the driven element-1n its initial POSIQOm Fig. 2 is a plan showing the driven eleqient at the extreme-forward end ot'its movement and about tobe released by the driviugsele ment. :Fig. 3 is a planinwhich the driven element is shownedl'irifigiits return movement and at the I point where the contact points are in, contact. with each oth 'h Like numerals refer to like'par'ts til out the several views of the-drawings.

rough.-

In the drawings, 1-5 is afdriving'elemeiit 1; e0ns1st1ng of. a-notched shaft having one or more teeth 6' hich-are. adapted'to sucees sively engage" a lug 7-' upon a driven-element 8, the direction 'off r otation of the; driving element being indicatedfbyan arrow; thereon.

Ihe driven element 8 when in'it's initial position rests against two steps-9 and "IOf'and p is held in engagementjtherewitliby ahe'licaltension spring 11 connects-dial; one'end to. an

insulated po st 12 and a't .its othercendfto a rivet 13 const1tiit-ing;a contact poiutlinsulated from the element .8. In-practice; one

' of the circuit wiresiwill' beconnectedto the post 12 and thus the spring '11 will also con? stit-ute a conductor for the "current.

The driven element 8 is provided-with a resilient portion 14' formeduon or secured thereto and on this portion is mounted a second contact point 15.; In practice, the

points 13 and {15 will be'formed-sofws'onie suitable material such *a's.,-platimim.- 'Ihe driven'element 8 is" provided with a stop 16 which is nomnally-englfg'ed by the free' end of the resilient portiofitfl and which thus limits its movement in one direction. 4

The resilient part 14 is bent to form a cam -17 which'inmoving from the position shown in Fig. 1 to the position shown in Fig. -3 pas bya stationary abutment 18\ with-' outfliouching the same or'without touching same suflicient to cause the contacting "points Band 15 0- be forced into" contact witheach other..;= 'The abutine 18 is pl-ef eiably adjustable and may 9 sistof a screw having screWJhreaQ Q ehgagen ent with a projectionif lg extending from asuitablebase 20. 1 g The shaft [ii is journaled in a suitable bearing 21.

Inflpractice, where the device is used in connection with ignition apparatus for internal combustion engines, the post 12 will be. connected to one of the wires of the primary windin of an induction coil, while the other end the primary winding will rame be grounded upon some part of the with which thebase20 will also be electrically connected.

be general operation offthe circuit making and breaking device hereinbefore specifically described follows: The initial position of the "driven element isshown in Fig. 1. Assumin'gthe driving element- 5 to be; rotating counterclockwise, the'tooth 6 which is in engagement with theflug 7 car- 1 come 'into contact with each other. I The abutment- 18 will be adjusted in ractice so.

that the cam 17 will just clear jt esame'in passing by on its forwalrd movement. the lug 7 is released by the tooth 6' atth point shown in Fig. 2, said In rides out.- wardly toward the right upon ti cal part of the tooth and rapidly backward by the spring 11' and during-this movement the cam 17 'enga es the abutment 18, as shown in Fig. 3,. t hereby carrying the. contact point 15 into-contact with the contact point 13 for a very brief interval of time and itwill be seen that this.

interval of time is always thesame'irrespee tive of the speed of the driving element- '5 since the return movement ofthe driven. element is accomplished by means of the spring 11 independently of the ele ment. Continued movement of the driven element from the position shown in'Fig; 3 results in the same arriving in its initial position, as shown in Fig; 1, reitdy to beengaged by the next tooth upon the driving element.

Where the device is used in connection with internal combustion engines, the driving element 5 will be rovided with a num: ber of teeth corresponding to the number of cylinders of the engine.

The interval of time during which the contact points are in contact with each other is just sufficient to cause the ignition of the explosive charge in the engine cylinder 0" cylindersand consequently a great saving in the current consumption is eflected, this be ing a matter of great importance where batteries 'are'employed to furnish the current.

Ha'vin thusdescribed my invention, what I c aim and desire by Letters Patent tosecure is: f i

1. A circuit making and breaking device having, in combination, a driving element, an element driven by said-driving element in one direction and released there-from at a certainpoint, a spring connected to said e cylindriv, drawn very I l I driven element and adapted. to-return the same to its initial position after being released, pair of cotiperating contact points carried by said driven elementfand means cooperating with said driven element on its return movement to "move one ofsaid contactpoints into contact with the other.

2. A circuit making and breaking device having, in combination, driving, means,- ineans driven by said driving means in one direction and released therefrom at a certain point, a spring connected tosaid driven means and adapted to return the same to its initial position after being released, said driven means including a pair of cotiperating contact points, and means cotiperating with said driven means on the return movement thereof to move one of said contact points into contact with the other.

3. circuit making and breaking devicehavmg, in combination, driving means,

means driven by said driving means in one direction and-released at a certain point,

I-Saiddriven means including two cotiperatii'ng "Contact points, a spring connected to said driven means and adapted to return the same to its initial position after being released, and mcans codperating with said driven means on the return movement there of to" move one of said contact points into contactwith the other. 7

- 4. A circuit. making and breaking device having, in combiuatiom driving means, means driven by said driving means in one direction and released at a certain point, a spring connected tosaid driven means and adapted to return the same to its initial position after being released, said driven means having two relatively movable parts carrying cooperating cont-act points, and means to engage one of said parts during its return movement thereby to move the said contact point carried thereby into contact with theother.

5. A circuit making and breakingdevice having, in combination, driving means, means driven by said driving means in one direction and released at a certain point, a spring connected to said driven means and adapted to return the same to its initialposition after being released, said driven means including two relatively movable parts one of which is. resilient, said parts having thereon two cooperating contact points, and

means acting on said resilient part during its return movement thereby to move the contact point carried thereby into contact with the other.

6. A circuit making and breaking device having, in combination, driving means, driven by said driving means in one direction and released at a certain point, a spring connected to said driven means and adapted. to return the same to its initial position after being released, said driven meaxis tyio i' el ativelyi niovabl I parts,f=dne 'of which is resilient and-is prmf my handin presence of two subscribing witj videcl with a cam,'said'pa,rts hawingthereon nesses. 7

WINIHROP 'A. V STILES.

two qoiiperating contact points,"ai1d means 5 tuengzige-said camduring the return movea W1tnesses:

Tmentrthereof, whereby said contact points j LOUIS A. JONES, ai ejnldved into contact with each other, SApm V. ;M CARTHY. 

